Plug for lubricator-cups.



A; McDONALD.

PLUG FOR LUBBIOATOR CUPS. APPLIOATION nun APR. 3, 190a.

Patented Nov. 24, 1908.

AL McDONALD, or DALHARLTEXAS.

PLUG FOR LUBRIGATOR-CU'PS.

I Specification of Letters Patent.

Patented Nov. 24, ices.

Application filed April 8, 1908. Serial No. 424,989.

t all it may concern I Be it known that I, An MCDONALD, a citip'ge'n of the United States, residing at Dalhart,

view through the i when being threaded 'provl ed at one end 1 receiving the crank m the county of Dallam and State of Texas,

' have invented certain new and useful Improvements in Plugs for Lubricator-Cups, of whichthe following is a specification.

The object of the present invention is the provision of a novel means forpreventing the.lossof plugs from lubricatoreups' such as are commonly employed in connection with the rods connectedto crank ins.

A further object of the invention is the provision of a lubricator cup embodying a' [novel construction whereby the same 7 can --be readily placed in position or removed therefrom and the plug can be adjusted as re uired'. a or a full understanding of the invention 'and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which:

igure'l-is a sectional view showing the improved lubricator cup applied. Fig.2 is a'fdetaciied-persp cator cup. Fig. 3 1s a longitudinal sectional same. Fig. 4 is a transverse sectional view on the line 4-4 of Fig.3. v

Corresponding and like parts are referred to -in the following description and indicated in-all the views of-the drawings by the same reference characters.

Referring to the drawing, the numeral 1 designates a crank pin and 2 a rodwhich is.

with an eye 2 loosely pin. An opening 3 -is formed In one side of the eye to admit of "applying lubricant to the crank pin, and the outer portion of the openlng is enlarged and ill iternaliy threaded to receive. an oil cup 4.

- hisgegp fhisin the nature ofa sleeve which is exter naljlythreaded 'so as to be screwed within the-opening 3 and internally threaded ,to receive the plug 5. I

An exterior shoulder-7 is provided. at the outer end of the oil cup and engages theeye 2' to limit the inward movement of the cup projects from the" outer end of the cup and the. sides QLthe yoke have the inner faces ective view of the lubri= in position. 'A yoke -8 move a. stem adjusting the plug.

turned against the yoke so as 1 the combination of thereof threaded to correspond to the threaded. interior of the on so that the plug. 5 can be turned outwar 1y beyond the mouth of the cup. Projecting from this plug 5 is a stem 9- which has athreaded engagement with the yoke and'has the extremity thereof given a square or angular formation as at 9* to admit of engagement by a wrench for It will also be observed that a jam nut 10 is arranged u on the stem 9, and the said jam nut is a apted to be plug securely in an adjusted position. With this construction it will be obvious that the plug 5 can only be removed through the inner'end of the oil cup and issecurely held against accidental loss when the cup is in position. It will also be apparent that when the plug is moved outwardly between the arms of the yoke 8 access can. be readily had to the cup to place grease or lubricant therein, and the said lubricant will be forced to lock the throu h the feed opening 3 when the plug is inwardly. Having thus described the invention, what is claimed as new is:

1. In a device of upon the cup, a plug having a threaded engagement with the lnterior of projecting from the plug and having a threaded engagement with the yoke;

the character described,. a lubricator cup, a yoke the cup, and

2. In a device of the character described,

the combination of a lubricator cup, a yoke upon the lubricator cup, the arms of the yoke and the interior of the cup being correspondingly'threaded, a plug engaging the threads of the lubricato'r cup and yoke, and means for turning the plug.

3. In a device of 'the character described,

the .combination of a lubricator cup, a yoke upon the'cup, the arms of the yoke and the interior of the cup being correspondingly threaded, a plug engaging the threads of the cup and yoke, a stem projecting from the plu and having a threaded engagement wit the yoke, and a jam nut upon the stem. 4 In testimony whereof I affix my signature in presence of two witnesses.

. AL McDONALD. Mg -Witn'esses:

R. C. BALAAM, D. B. H m. 

